Invitation Code Page deleted?

ClumbsyKhajiit

I'd like to invite a friend as his mail system is broken, his in game mail box is showing empty but when we send him mail or when he uses guild traders nothing comes through. This issue has persisted for over a month and I've seen that he's responded to several, but only automated emails, after submitting several tickets. Now it would appear as though you've deleted the page with the steps and links to acquire an invitation code. Is there something that I am missing?